A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Mylsamy, S.
- Removal of Malicious Nodes Launching Blackhole Attack in MANETs
Authors
1 Department of Information Technology, Kongu Engineering College, Perundurai, IN
Source
Wireless Communication, Vol 8, No 1 (2016), Pagination: 6-10Abstract
Mobile Adhoc Network (MANET) have been widely used for various applications such as military crisis operations and emergency rescue operations. The infrastructure-less nature and the dynamic topology features of MANET makes these networks highly vulnerable to various security issues .The primary requirement for the establishment of communication among nodes in mobile ad hoc networks is that nodes should cooperate with each other. With the existence of malevolent nodes, this requirement may lead to serious security concerns; for example, such malicious nodes may disrupt the routing process. In this context, preventing or detecting malicious nodes launching collaborative blackhole attacks is a challenge. This paper resolves this issue by designing a routing mechanism based on dynamic source routing (DSR), referred to as the cooperative bait detection scheme (CBDS). In this scheme, it integrates the proactive and reactive defense architecture and randomly cooperates with a stochastic adjacent node. By using the address of an adjacent node as a bait destination address to bait malicious nodes to send a reply message (RREP) and strange nodes are detected using a reverse tracing technique thereby ensures security. Simulation results are provided, showing that in the presence of malicious node attacks, the CBDS outperforms the DSR protocol in terms of performance metrics such as throughput and packet delivery ratio.
Keywords
Dynamic Source Routing (DSR), Collaborative Blackhole Attacks, Malicious Node, Cooperative Bait Detection Scheme (CBDS), Collaborative Bait Detection, Detection Mechanism, Grayhole Attacks, Mobile Ad Hoc Network (MANET).
- 3-D Vision vs 2-D Vision in Minimal Access Surgery-A Prospective Randomized Controlled Study
Authors
1 V. G. Hospital, IN
2 V.G. Hospital, Coimbatore, Tamil Nadu, IN
Source
The Indian Practitioner, Vol 70, No 8 (2017), Pagination: 40-43Abstract
Objective: The aim of this study is to evaluate the advantage of using 3D laparoscopy over conventional 2D laparoscopy on various operative procedures.
Methods: From April 2012 till April 2017, 1200 patients were selected for various laparoscopic procedures and were divided into two groups. One group of patients were selected for 2-D Laparoscopic surgery and another group for 3-D laparoscopic surgery. Operative performance in both groups was compared in terms of time, stress and confidence of the operating surgeon.
Results: Operative time interval for various procedures was significantly less in 3D Group as compared to 2D Group . Also,it was found that the surgeries performed in 3-D were much easier compared to 2-D in terms of stress and confidence of the operating surgeon.
Conclusion: Advantages of 3D laparoscopy were well appreciated during various operative procedures as compared to 2D laparoscopy.
Keywords
Laparoscopic Surgery, 2-D High Definition Group, 3-D High Definition Group.References
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